Air heater



Match). 1925. I

- "E. ELLISON AIR HEATER Filed Feb 20; 1922 2 Shuts-Sheet 1 Kali/[2,1630% W Ma ch 10. "1925.

E; 'J. ELLISON AIR HEATER Filed Feb. 20 1922 Patented Mar. 10, 1925.

UNITED STATES LPATENT OFFICE.

EARL J". ELLISON,OF MAYWOOI), ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE XXTH CENTURY HEATING & VENTILATING 00., OF AKRON, OHIO, A COR-- PORATION or OHIO.

AIR HEATER.

Application filed February 20, 1922. Serial No. 537,943.

To all whom it may concern:

Be it known that I, EARL J. ELLIsoN, a citizen of the United States, and resident of Maywood, in the county of Cook and State of Illinois, have invented acertain new and useful Improvement in Air Heaters, 'of which the following is a full, clear, concise, and exact description, ref erence being had to the accompanying drawings, forming a part of this specification.

My invention relates to improvements in air heaters 0f the type used either singly or in batteries for heating air for heating and ventilating purposes, or for high temperature drying and de-hydrating processes, and relates particularly to an improvement in the heater described and illustrated in my Patent No. 1,399,756, issued December 13, 1921.

The specific improvement of my present invention comprises a damper located in a battle above the radiator section of the heater, which damper may be opened to facilitate the circulation of air under certain rarely occurring abnormal conditions.

It sometimes occurs in the initial starting of a warm air heater of the type shown in my aforesaid patent, when the air in all of the warm air distributing pipes is cold, that a local circulation about the heating elements of the heater takes place within the warm air chamber without suflicient heat getting past the rear end of the upper baffle to quickly start circulation through the warm air distributing tubes. I have found, however, that by opening a passage through the upper baffle near the front wall of the heater, so that someof the freshly heated air can pass directly into the upper part of the warm air chamber and thus Figure 2 is a horizontal section through the damper operating mechanism;

Figure 3 is a plan view of a battery of dampers and the associated baffles and radiator sections, and

Figure 4: is an enlarged plan view of the damper operating mechanism for a pair of dampers in a single baflie.

As more specifically described in my aforesaid patent, a single unit of my heater comprises a combustion chamber 10 connected at its rear through passages 11 with a radiator section 12, this section comprising tubes for conducting the combustion gases forwardly and then rearwardly before they are discharged through the pipe 13 to the chimney (not shown).

The heater is enclosed between a forward wall 15 and a rear wall 16, the upper space between which constitutes the warm air chamber, from which radiates the tubes for distributing the warm air to the various parts of the building to be warmed, or to any other location where the heat is to be utilized.

A baffle plate 17 extends from side wall to side wall of the battery of heaters, and also extends to the rear wall 16, but stops short of the front wall of theheater, thus causing the air to pass forwardly along the combustion chamber and upwardly to the radiator section. A second baffle 18 extends rearwardly from the front wall 15 and from side wall to side wall, causing the air under normal conditions to travel rearwardly along the radiator section 12 before entering the warm air chamberabove the baffle 18.

Near the forward portion of the battle. 18, a pair of dampers 19 is provided The.

The shaft 30 carrying the lever 23 and sector 24 is preferably extended from unit to unit so that the dampers may be opened and closed above all of the heater units simultaneously.

In the operation of this heater, when the fire is first started, the dampers 19 are preferably opened so that the air heated about the combustion chamber passes directly into the upper part of the warm air chamber, thus effectively preventing a local circulation, which may prevent a major part of the heated air from passing into the warm air chamber. As soon as the warm air has started up for rising distribution tubes, the dampers 19 may be closed, and circulation will continue without further interrupt-ion.

The foregoing invention is obviously applicable to types of heaters other than that illustrated in my Patent Number 1,399,756 of December 13, 1921, and the invention, therefore, is not to be unduly limited to the particular application herein described, it being understood that modifications may be made without departing from the spirit or scope of my invention.

Having thus described my invention, what I claim is:

1. In a heater, vthe combination with a combustion chamber, of a radiator section mounted above the combustion chamber, a baffle plate above the combustion chamber and below the radiator section, said baflie plate permitting-flow of air from the space surrounding the combustion chamber to the space surrounding the radiator section at a point near the forward end of the combustion chamber, a second bafile plate above the radiator section, and a damper in the second bathe plate near the forward end of the radiator section to permit the vertical flow of air past the forwardend of the radiator section into the space above the second baille plate.

2. In a heater, the combination with a combustion chamber having an external ra :diating surface, anda radiator scctionlocated above the combustion chamber and arranged to receive combustion gases therefrom, of a rear, side, front and top walls enclosing said heater in a warm air chamber,a baflle plate extending from the rear and side walls between the combustion chamber and radiator section and terminating so as to leave a space between its edge and the front wall ,,a second bafile plate extending from the front and side walls toward the rear wall and covering the major portion ofthe radiator section, and a damper in said'second baffle plate near the front wall arranged to be opened to permit a flow of air into the upper space of the warm air chamber, said baffle serving when the damper is closed to cause air to travel in opposite horizontal directions along the combustion chamber and the radiator section within the warm air chamher.

3. In a heater, the combination of a combustion gas passage comprising a combustion chamber, and a radiating conduit disposed above the chamber, a passage for the flow of heated air over the chamber and over the radiating conduits formed by a lower horizontal battle disposed between the chamber and the conduit and by an upper bafile above the conduit, the battles permitting vertical flow of the heated gas around opposed ends of the respective battles, the upper bafile having a damper over said opposed end of the lower battle which when opened shunts the heatedair passing over the chamber around said end of the lower battle and directly through the second battle, for starting the flow of said heated air.

l. A heater comprising a heat radiating combustion chamber, a heat radiating con duit thereabove, a lower battle disposed between the chamber and the conduit, and an upper bafile disposed above the conduit, said battles confining the air to be heated to a horizontal flow in one direction over the chamber and hence around the lower bafiie to a horizontal flow over the conduit-in an opposite direction, the upper :bafile having a damper therein which, when closed, conlines the air to its said horizontal flow over the conduit but which, when open, permits the air to flow directly through the upper battle after passing over the chamber.

5. The combination of a battery of heater units set side by side, each comprising a heat radiating combustion chamber, a heat radiating conduit thereabove, a lower bathe disposed between the chamber and the.conduit, and an upper bafiie disposed above the conduit, said baffles confining the air to be heated to ;a horizontal flow in one direction over the chamber and hence around the lower bailie to a horizontal flow over the 0011- duit in an opposite direction, the upper bai'lle having a dampertherein which, when closed, confines ,theair to its said horizontal flow over the conduit but which, when open, permits the air to flow directly through the upper bafile after passing over the chamber, and common operating means forsaid dampers whereby they may be simultaneously opened or closed at will.

In witness whereof, ;I hereunto subscribe my namevthis ,7th day-,ofFeb, 1 922.

l EARLJ. ELLISON, lVitnesses .7

EMILE J. Bonnenors, DAGMAR Pnrnnson, 

